214 EXAMINATION OF NAPHTHA FROM RANGOON PETROLEUM. 
the quantities of liquid in the degree-fractions fell away to almost nothing; there is 
evidently no compound present between 234° and 250°. 
The fraction 230°-231° boiled at 232.75° (corrected). 
On analysis, 0.2871 grm. of the fraction 230°-231° gave 0.3541 grm. water, and 0.91 
grm. carbonic acid. Or, 
Found. Theory. 
= Carbon, 86.38 Cog 85.7 
Hydrogen, 13.69 H5g «14.3 
100.07 100.0 
In determining the vapor-density of this substance the balloon was filled with an 
atmosphere of carbonic acid' after the introduction of the liquid. The following result 
was obtained : — 
Temperature of balance, .. es . ‘ eS Sw : : : a 22° 
Hs “ oil-bath, Pe a ae ee 274° 
Excess of weight of balloon, °. : : : ‘ « d - - 0.6863 
Capacity & ‘ ‘ z : . ‘ : ‘ c é ‘ 233 c. c. 
Air remaining in te : ee che | . ; ae ; ce . 0 
Height of barometer, Sm cme eh ae of. rie cB m,. Sh Jp cabs 760.5 m. m. at 21° 
Density of vapor found, .  . ; : = » ee ee ae »  « 6.4225 
“ “ theoretical (Ces Hae) : ; Bey . . ‘ : 6.2940 
The specific gravity of the fraction 230°-231° was found to be 0.8445 at 0°. 
The attempts which we have made to isolate the constituents of that portion of Ran- 
goon naphtha which is more volatile than the hydro-carbons above described, were un- 
successful ; the quantity of naphtha boiling at temperatures lower than 175° having 
been so small that it could not be thoroughly analyzed by the process of fractional conden- 
sation. After protracted efforts to separate these volatile hydro-carbons from one 
another by means of a diminutive apparatus,we were at last reluctantly forced to aban- 
don the attempt, and to acknowledge our inability to obtain satisfactory results from 
such small quantities of the complex material. 
Indeed, the quantity of volatile naphtha at our disposal was so small that althoughat 
the last it was divided only into fractions of wide range, each of them representing three 
or more degrees of temperature, these portions in several instances soon became too 
minute to be operated upon at all, even in the smallest practicable apparatus. But 
since these volatile products had been subjected, first and last, to a large number of dis- 
tillations and fractional condensations, each of the fractions finally obtained must have 
1 In a previous attempt to determine this vapor-density in the usual way, without employing carbonic acid, the mixture of air 
and vapor in the balloon took fire with a slight explosion, the temperature of the oil-bath being then at 321°. 
